Why would you run a pool for 0% fee? You are not paying for server? Your time? Or you think you will get lot of miners because 0% fee and steal from them for a week of two....same old story
A bit cynical, I think people would notice after a day or two if mining was not working.
If he were going to rob you he would stand a better chance if he said 'introductory 0.1% fee for 2 weeks then 1% after', and skim a small amount of hashrate off the top, like MinerGate does.